Slowfinger
LH is all arpeggiated chords, no tricks here, first 4 notes in LH are B major (I) in root position, next 4 notes E major (IV) in 2nd inversion, then notice third 4 notes are same as first group, just in different order. Continue like this.
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I am a career theory teacher. Not gonna do this for you. You can see that the first 4 notes in the LH made a I chord. The RH notes all fit with that. Use that plan to finish your homework. Should take less than a minute - and it took me longer to type this on my phone.